diff --git a/excel_import_export/wizard/import_xlsx_wizard.py b/excel_import_export/wizard/import_xlsx_wizard.py
index 49be5c07a..b17d152a0 100644
--- a/excel_import_export/wizard/import_xlsx_wizard.py
+++ b/excel_import_export/wizard/import_xlsx_wizard.py
@@ -18,7 +18,7 @@ class ImportXLSXWizard(models.TransientModel):
         'xlsx.template',
         string='Template',
         required=True,
-        ondelete='set null',
+        ondelete='cascade',
         domain=lambda self: self._context.get('template_domain', []),
     )
     res_id = fields.Integer(